Rack mechanism



RACK MECHANISM Filed Jan. 2, 1943 Patented Apr. 11, 1944 2,346,424

NED SES OFFICE RACK MECHANISM Clifford J. Grifi'ith, Dimondale, Mich, assignor to Food Machinery Corporation, San Jose, Calif., a corporation of Delaware Application January 2, 1943, Serial No. 471,186

3 Claims. (01. 7429) My invention relates to mechanical powers and maintaining the rollers 30 always in proper meshhas for its principal object the provision of a ing relation with the teeth I8 of the sprocket I2.

novel and eificient rack mechanism. The screws 20 are a simple inexpensive and ef- The manner of accomplishing the foregoing obfective means for uniting the chain with the ject, as well as further objects and advantages, tube l3.

will be. made manifest in the following descrip- While I have shown but a single embodiment of tion taken in connection with the accompanying my invention, it is to be understood that various drawing in which: modifications may be made therein without de- Fig. 1 is a diagrammatic view of the preferred parting from the spirit of the invention or the embodiment of the rack mechanism of my inl scope of the appended claims.

vention, a portion thereof being broken away to WhatI claim is:

illustrate the hidden structure thereof. 1. In a rack mechanism the combination of:

Fig. 2 is a sectional view taken on the line 2-2 a sprocket; a tube having a slot formed longituof Fig. 1. dinally therein, said slot being adapted to re- Fig. 3 is a cross sectional view taken on the ceive said sprocket; a section of chain in said line 33 of Fig. 1. tube of the same pitch as said sprocket; means Referring specifically to the drawing, th rack for securing said chain to said tube, so that when mechanism In illustrated therein includes a rack said sprocket extends into said slot and meshes II which is adapted to operate in mesh with a With Said Chain, Said Chain a a t e tochain sprocket I2. gether form a rack, the edges of said slot en- The rack ll comprises a tube is having a lonin Said sprocket to m in n s id procket gitudinal slot I l formed therein, the surface of in p p a e t W h Said Chain.

the tub adjacent, i 1 1-, b i mined off to 2. In a rack mechanism the combination of: a

form fiat faces I5. The tube I3 is preferably probe having a longitudinal Slo t ere through vided with a fiat metal strap It, disposed therewhich e teeth of a sprocket are adapt d to exin opposite the slot I i, and with a section of tend; a fiat member p ed in d ub OPPO- roller chain :1 hi h is adapted t mesh t site said slot; a section of chain disposed in said teeth I8 of the sprocket I2. The chain I I practube between Said flat member and Sa 8101 tically fills the space it t t 3, and means for securing said chain to said tube, tween the slot la nd th ta1 trap is, The said chain being adapted to mesh with the teeth strap I6 and section of chain I! are united toof et properly toothed to match theregether, to maintain the chain section in taut With d extending inwardly through Said ot, condition, by screws 28) which pass downwardly the dg s 0 Said S1013 engaging a d p Cket to through endmost links of the chain section II, i in sai sprocket in pr p r i nment with through suitable apertures provided in the metal Said C a strap I5, and are screwed into tapped holes 2| 3. In a rack mechanism the combination of 2 a provided in th tube 13, tube having a relatively narrow longitudinal slot The rack l of my invention provides a, highly suitable f0! admitting into said tube the teeth eificient means of changin rectilinear motion of a sproc t Ope n the plane of said slot; into rotary motion or vice versa. The rollers 39 40 a section of chain disposed in said tube and of the chain I! develop relatively small friction adapted to have a meshin relatiOn Wit Said with the teeth I8 of the sprocket 12, so that very pro t t a flat strap disp sed in said tube small wear is produced on the sprocket or the 0 e pp Side Of Said Chain frOm aid 5 0 rack by the operation of the rack mechanism E ii. a means for Securing Said Chain, Said Strap nd Furthermore, the edges of the slot I I act as a said tube togeth r to or a o the edges 0f guide for the rack I I, thus keeping this in proper said slot engagi g Said p t to a tain Said alignment and meshing relation with the sprocket Sprocket in p op r a e t with Said chain.

I2. The metal strap I6 backs up the chain II, CLIFFORD J. GRIFFITH.

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